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(No Model.)

B. H. ELLIOTT. DUST ARRESTER FOR MINING DRILLS AND REAMERS- Patented Dec. 17, 1895 06% fla HEW ya:

Armani 5 Gamma Pmnuwno WASMW 510N176 UNITED STATES PATENT @rErcE.

ROBERT ll. ELLIOTT, OF BIRMINGHAM, ALABAMA, ASSIGNOR TO THE ALA LAMA BLASTING AND MINING COMPANY, OF SAME PLACE.

DUST-ARRESTER FOR MINING DRILLS AND REAMERS.

SPECIFICATION forming part of Letters Patent No. 551 ,465, dated December 17, 1895.

Application filed July 31, 1895. Serial No. 557,709. (No model.)

To aZZ whom it may concern.-

Be it known that 1, ROBERT H. ELLIOTT, a citizen of the United States, residing at Birmin ghain, in the county of Jefferson and State of Alabama, have invented certain new and useful Improvements in Dust-Arresters for Mining Drills and Reamers; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to dust arresters or accumulators for use in drilling and reaming boreholes in the mining of coal or other like soft or dust-yielding materials; and it consists of certain novel features hereinafter described and claimed.

In coal-inining, especially, the boring tool makes a great deal of dust, and where this dust is removed from the borehole by means of an air-blast, which returns dust-laden through the bore-hole, this dust becomes espccially objectionable to the operatives in the mine. The method of injecting air is described in the patents to R. H. Elliott and J. B. Carrington, Nos. 530,510 and 530,511, granted December 11, 180i, and will not be further described in this application. It is to arrest this dust that the hereinafter-described device was provided.

This device consists essentially of a hollow truncated cone inclosin g the drill-spindle and having its base encircling the outer orifice of the borehole, against which it is held by suitable means, while the drill or rcamer spindle continues to revolve. The said cone is provided with a hose or pipe leading from the lower portion thereof into a suitable receptacle, which is preferably partly filled with water.

The said invention also consists in certain novel features of construction and arrangements of parts, which will be hereinafter more fully described and claimed.

Reference is had to the accompanying drawings, in which the same parts are indicated by the same letters throughout both views.

Figure 1 represents a vertical section through the borehole, showing a combined mining drill and reamcr in operation and the dust-arrester mounted on the drill-spindle and in operative position. Fig. 2 represents the means of connecting the dustcollecting cone to the engine-frame, whereby said cone is held in the desired position.

A represents the seam of coal or other mineral being mined, which is represented as having been bored through, as at a, and reamed out somewhat, as at a", by the auger D and rea1nerblades C, respectively. These reamer-blades are extensibly mounted in the reamer-head B, to which the auger D is revolubly mounted, as described in my application, Serial No. 552,9i0, filed June 15, 1895.

The herein-described dust-arrester may be used with any form of boring or reaming tool, and those shown in Fig. 1 are intended to be merely typical.

The drill-spindle B,which is screw-threaded and fed in the usual way, is driven by the gear-wheel E and pinion F from the engine ll mounted between the jack posts K, to which the extensions 72. in the engine-frame or bed-plate are secured in any convenient way. The drill is fed by means of the double arms M pivoted to the machine'frame at m and clamped together by means of the clamp-screws at. These arms carry two halfnuts m which engage with the screw-threads on the drill-spindle.

The engine-frame is connected by rods P with a ring Q, hinged at q and secured, as at q, opposite said hinge, which ring may be provided with spring g pressing against the base of the cone R, which is also hinged and secured, as at r, opposite said hinge, whereby the said cone may be readily put onto the drill-spindle or taken off when desired. The face of the cone is provided with a fringe of wire or hair bristles 1, set on end and adapted to enter into the inequalities in the face of the seam, and so cause the base of the cone to fit snugly against the mineral around the bore-hole. This wire serves as a screen to prevent the passage of the larger particles of dust and soon becomes so choked up with solid particles as to be practically air-tight. The lower portion of the cone is provided with an orifice r to which the hose S is connected, which hose leads to a vessel T which is preferably partly filled with water, or said hose maybe led to any desired receptacle, or to ICO any position Where the dust may be blown through Without inconvenience to the operatives.

WVhile it is preferable to blow the dust into Water it may be collected in a dry state by placing a Wire screen over the top of the receptacle T.

It will be obvious that various modifications of the herein-described apparatus might be made which could be used without departing from the spirit of my invention.

Having thus described my invention, what I claim, and desire to secure by Letters Patent of the United States, is-

1. A dust arrester for use in drilling or reaming bore holes, which comprises a hollow truncated cone loosely mounted on the drill spindle, and provided with a fringe on the face of the base thereof, adapted to fit snugly against the face of the mineral about the bore hole, means for holding the said cone inposition against the said mineral, and an orifice for the escape of the dust from the lower portion of said cone, substantially as described.

2. In a dust arrester for use in drilling or reaming bore holes, the combination with a hollow truncated cone, provided with a fringe on the base thereof, and loosely mounted on the drill spindle, of means for holding the said fringe against the face of the mineral about the bore hole, and a hose for carrying off the dust from the lower portion of said cone, substantially as described.

3. In a dust arrester for use in drilling or reaming bore holes the combination with a hollow truncated cone, loosely mounted on the drill spindle, and provided with a fringe on the base thereof, of means for holding the vsaid fringe against the face of the mineral about the bore hole, and a hose for carrying off the dust from the lower portion of said cone, substantially as described.

In testimony whereof I affix my signature in presence of two Witnesses.

ROBERT H. ELLIOTT.

\Vitnesses J. B. CARRINGTON, WILL T. DILLON. 

